摘要：
You are given two arrays aa and bb, both of length nn. All elements of both arrays are from 00 to n−1n−1. You can reorder elements of the array bb (if 阅读全文
摘要：
You are given a set of points x1x1, x2x2, ..., xnxn on the number line. Two points ii and jj can be matched with each other if the following condition 阅读全文
摘要：
output standard output output standard output output You are given integer nn. You have to arrange numbers from 11 to 2n2n, using each of them exactly 阅读全文